Lubricating apparatus



lnuenfol ErnesTwDoUi v Sm mim bm QM E W DAVIS LUBRICATING APPARATUS Filed March 17, 1920 Aung.. 2H H923.

Patented` Aug.. 2li, i923? untreu, srarias 'Param clasica.,

ERNEST W. DAVIS, 0F OAK PARK, AILLlIN'IiliS, ASSIGNOR, BY MESNE ASSIGNMENTS,

x TO THE BASSICK UFACTURING COMPANY, A CORPORATION 0F DELAWARE.

LUBRICATING APPARATUS.

.applicateur med March 17, 1920. serial Nass'ze. A

To all whom it may concern.'

Be it known that L'EnNns'r W. DAVIS, a

citizen of the United States, and resident of Oak Park,in the county of Cook. and State of Illinois, have invented a certain new and useful Improvement in Lubricating Apparatus, of which the following is a full, clear, concise, and exact description, reference beinghad to the accompanying drawings, forming a part of this specification.

-My invention relates v4to improvements in lubricating apparatus, andn is especially concerned with improvements in lubricating apparatus of the type disclosed in the patent to Arthur V. Gullborg, No. 1,307,7 33, 'of June 24,1919. i s

The objects of my invention are:

First: To' provide a lubricant ompressor comprising aV barrel or cylinder having a piston slidable' therein and operated by -a screwthreaded piston rod, the barrel being .provided with a flexible discharge conduit,

and means whereby either end of the lexible discharge conduit may be quickly and easily attached to and detached from the compressor barrel; a

Second: To provide a-compressor of the type described, wherein the discharge conduit is provided with a coupling member at each end thereof, so constructed that it may be attached either -to thezbarrel of the compressor or to the nipples, to which lubricant Other ob`ects will appear as this descrip! had to the tion progresses', reference bein accompanying drawings, in w ich Figure lis a sideelevation of my improved compressor, showing the free end of 'Figure 3 is Ia view` similar to. FigureQ,

but showing the coupling member at the opposite end of the discharge conduit connected with the nipple secured tto the dis` charge end of thecompressor; and 'i Figure 4 is aside elevation of a coupling member so constructed that it is not neces-y sary to relieve the pressureon the lubricant in the compressor to make it possible to de- -tach the coupling member from the nipple.

Throughouty the several views similar reference characters will be used for referring to similar parts.

There lubricant compressors of thezfyipel disclosed in the patent to Arthur V. Gruliborg, referred to above, and of the type dis# closed in this application, are employed,tlie

said lubricator, comprising a barrel, one end l of which is provided with a cap, when it is desired to fill the compressors with lubricantthe cap is detached and in order to permit the escape .of air from the compressor barrel during the filling operation, the discharge conduit is likewise detached from the opposite end of the barrel` It is also desirable to detach Vthe. discharge conduit v from the compressor whenever the compressor is placed in a tool box, as this permits the" compressor to be stored in a smaller space without bending the discharge conduit. It has heretofore been the experience that when the discharge conduit is detached fromlthe barrel, there may be a small vair bubble, compressed in the lubricant intermediate the ends of the discharge conduit, which expands, and especially so in hot weather, forcing lubricant from both ends of the discharge conduit. l

One of thevobjects of my invention, as stated above, is to provide means forcltosing both ends of the discharge conduit when it is detached 4from the compressor barrel,

easily detached from the nipple.

- cant.

and from the nipple, so as to prevent dis- (charge of lubricant from the discharge conuit. y

When a coupling member, such as that disclosed in the patent to Gullborg, is attached to a nipple and the compressor is actuated to force lubricant therethrough, the coupling member becomes locked to the nipple by the reaction of the lubricant pressure upon the end of the nipple, and it is necessary'to relieve the lpressure on the lubricant by retracting the piston in the compressor, before the coupling member can be Consequently, another object of my invention is to provide a coupling member so designed that it can be released from the nipple without first relieving the pressure on the lubri- With suchv a coupling member it is necessary to provide means to prevent the escape of lubricant from the free end of the discharge conduit when the coupling member at this end of the discharge conduit is disconnected from a nipple.

Referring to the drawings, the reference character 5 indicates the barrel or cylinder of/m improved compressor, which is provide at one end with a cap 6, detachably secured thereto in any desired manner.

A piston (not shown) is slidably mounted in the compressor barrel, and is actuated by means of the screw-threaded rod 7, having the handle 8. The opposite end' of' the compressor is provided with a hollow boss 9, into which is screwed the nipple 10, shown in side elevation in Figure 3. This nipple is similar tothose disclosed in the patentto Arthur V. Gullborg, referred to above, except that it is not provided with a closure. The pin 11 provides means for coacting with the bayonet slots in the coupling r members about to be described, for securing one end of the discharge conduit to the compressor.

The reference character 12 indicates a lubricant receiving nipple, one end of which is Y provided with screwthreads 13, whereby it may be attached to a bearing to be lubricated, and the other end of which is providedl with a pin 14, adapted to co-act with the bayonet slots in the coupling members, for making a detachable connection withthe coupling members. The nipple 12 is provided with a spring pressed closure 15 similar to that shown in the Gullborglpatent I shall now describe my improved coupling member, one of which is attached to each end of the flexible discharge conduit 16 of the compressor. This coupling member comprises a sleeve 17, the end 18 of which is provided with an enlarged bore adapted to receive one end of the flexible discharge conduit 16, this end of the sleeve being soldered or otherwise secured to the end of the flexible conduit. Before the end of the flex ble conduit is inserted in this end of' the sleeve l17 a finishing ferrule 19 is soldered thereto. An annular flange 20 projects from the inner wall ofthe sleeve 17 at a point intermediate its ends, forming a discharge port 2 1, and a valve seat 22,'which is adapted toco-act with the valve 23. The valve 23 is provided with a stem 24, which is hollow throughout a portion of its length, to provide a passageway for the lubricant, which communicates with the space between the hollow valve stem and the walls of the end 25 of the sleeve 17 through the ports 18 formed in the side walls of the hollow stem. The open end of the hollow stem registerswith the discharge po-rt 26 in the cup leather or gasket 27, which is slidably mounted in the end 25 of the sleeve 17, and with the opening in the end of the nipple 12, which receives the lubricant. The open end of the valve stem is flanged over on the washer 28, which acts as a follower for the cup leather or gasket 27, and as an abutment for one end of the spiral spring 29, the other 'than the bore of the outer end 25 of the sleeve 17, and thus forms a shoulder 33 tending to limit the outward movement of the gasket 27 under the influence of the spring 29. It

will, of course, be apparent that the valve 23 performs the same function when it is closed.

The coupling member at the opposite end of the flexible conduit, which is shown in Figure 3, as being connected with the nipple `10, is similar in all respects to the coupling member shown in Figure 2, which I have just described. I' shall now describe the mode of operation of my improved appa# rat-us. When the coupling members at the opposite ends of the discharge conduit are connected with the compressor barrel and the lubricant receiving nipple, as shown in Figure 1, the ends of the nipples contact with the gaskets, forcing them inwardly against the pressure of the springs 29, and displacing the valves 23 from their seats`22. In this manner a continuous passageway is afforded from the compressor to the nipple, and upon actuation of the piston in the compressor lubricant will be forced into the nipple. When a sufficient quantity of lubricant has thus been forced into the nipple, with the type of coupling shown in Figure 1, wherein the` transverse portions 35 of the t0 relieve the pressure on the lubricant in the compressor before the coupling member can be detached from the nipple. After pressure has been relieved the coupling member is detached from the nipple in the usual manner, but in so doing the gasket 27 under the pressure of the lubricant and the spring 29 will remain in sealing contact with the end of the nipple, until the valve 23 seats upon the valve seat 22, so that when the coupling member is completely detached from the nipple, therewill be no escape of lubricant from the free end of the flexible discharge conduit.

With a coupling member similar in all lrespects to those disclosed in Figure 1, 2 and 3, except that the transversely extending portion 35 of the bayonet slot extends at right angles to the longitudinally extending portion of the slot and is provided with straight edges, it is unnecessary to relieve the pressure in the compressor before detaching the coupling member from the nipple, as the only resistance which must be overcome is that of the friction of one edge of the slot on the pin. With such a construction it is of course highly necessary to provide means to prevent the escape of lubricant from the "free end of the discharge conduit when the coupling member is detached kfrom the nipple. My improved coupling accomplishes this result in a very eiiicient manner.

lt will be clear vfrom the above description that 'lhave provided means whereby a discharge conduit can be quickly and easily attached to and detached from a compressor barrel, and which embodies means for preventing the escape of lubricant from both ends of the discharge conduit.

While I have described the details of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details, but is capable 'of other adaptations and modifications within the scope of the appended claims.

Having thus described my inventiomwhat l claim is:

l. The combination with a nipple for receiving lubricant, of a lubricant compressor having means for dischargingl lubricant, comprising a nipple, a discharge conduit for said compressor, provided at each end with a coupling member comprising a sleeve fixedly secured to said conduit and provided intermediate its endswith a port having a. valve seat, a valve having a solid head for coactlng with said seat, and a hollow stem projecting through said port, lthere being a clearance space between said stem and the walls of said port, the said valve opening inwardly and the stem of said val'vebeing irovided with a lateral port, a gasket secure to the outer end of said stem, and adapted to bear against said nipple, and the inner walls of said sleeve, said gasket being provided with a. port in registry with the. open end of said stem, a spring confined between a portion of said sleeve and said gasket for closing said valve on its seat, land means for securing said sleeve to said nipple, comprising a second sleeve rotatably mounted on. said first mentioned sleeve, said second sleeve and said nipple being provided with co-acting means for eii'ecting a detachableconnection. i Q.,

2. The combination with a vnipple forreceiving lubricant, of a lubricant compressor having means for discharging lubricant, comprising a nipple, a discharge conduit for said compressor, provided at each end with a coupling member comprising a sleeve ixclearance space between said stem and the walls of said port, the said valve opening inwardly and the stem of said valve being provided with a lateral port, a gasket secured tothe outer end of said stem, andA adapted to bear against said. nipple and the inner Walls'of said sleeve, said gasket being provided with a port in registry with the open end of said stem, a spring for closing said valve on its seat, and means for securing said sleeve to said nipp-le.

3. The combinationwith a nipple formeceiving lubricant, of a discharge conduit Iprovided at itsfree end with a. coupling member comprising a sleeve fixedly secured to said conduit and provided intermediate its ends with a port having a valve seat, a valve having a solid head for co-acting with said seat, and a hollow stem projecting through said port, there being a clearance space between said stem and the walls oi.' said port, the said valve opening inwardlyand the stem of said valve being provided with a lateral port, a gasket secured to the outer end of said stem, and adapted to bear against said nipple and the inner Walls oi said sleeve, said gasket being provided with a. port in registry with the open end of said stem, a spring for closing said valve on its seat, and means for securing said sleeve to said nipple.

d. The combination with a discharge conduit for a lubricant compressor, of a coupling member comprising an inner sleeve, one end of whichis rigidly secured to one end of said discharge conduit, a valve seat in said inner sleeve intermediate the ends thereof, a centrally apertured gasket slidably mounted in the other end of said inner sleeve, an outwardly closing valve for co-acting with said seat, a hollow valve stem ex lli] 12elv spring in said inner sleeve for urging said In Witness whereof, Ihereunto subscribe valve to its lclosed position, an annular rib my name this 9th day of March, 1920. extendingoutwa-rdly from saidinner sleeve,

and an outer sleeve rotatably mounted 0n ERNEST u' DAVTS' said inner sleeve, said outer sleeve compris- Witnesses: ingr two parts detachably connected, one of MARY A. COOK,

said parts resting against said annular rib. ANDREW WINTEnooRN. 

